1 migratetoimage 2? -copy id 3 -vdisk 4 source_vdisk_id 4 source_vdisk_name 5 6? -threads number_of_threads 7 -mdisk 8 unmanaged_target_mdisk_id 8 unmanaged_target_mdisk_name 9? -tier 9.1 ssd 9.1 enterprise 9.1 nearline 10 -mdiskgrp 11 managed_disk_group_id 11 managed_disk_group_name